<template>
 <el-container class="home-container">
     <!-- 头部区域 -->
  <el-header>
      <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体区域 -->
  <el-container>
      <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px ' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">
          |||  
        </div>
        <!-- 侧边栏菜单区域 -->
     <el-menu background-color="#333744" text-color="#fff" active-text-color="#4298F5" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">

        <!-- 1级菜单 -->
      <el-submenu :index="item.id + '' " v-for="item in menulist" :key="item.id">
          <!-- 1级菜单的模板区域 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>

        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
          <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>

      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
        <!-- welcome路由占位符 -->
        <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menulist: [],
            iconsObj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao',
            },
            isCollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created() {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            window.sessionStorage.clear();
            this.$router.push('/login');
        },
        // 获取所有的菜单
        async getMenuList()
        {
           const {data: res} = await this.$http.get('menus')
           if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
           this.menulist = res.data
           console.log(res);
        },
        // 点击按钮切换菜单的折叠和展开
        toggleCollapse() {
           this.isCollapse = !this.isCollapse
        },
        // 保存链接的激活状态
        saveNavState(activePath) {
            window.sessionStorage.setItem('activePath', activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    .el-header {
        background-color: #373D41;
        display: flex;
        justify-content: space-between;
        padding-left: 0px;
        align-items: center;
        color: #fff;
        font-size: 20px;
        > div {
            display: flex;
            align-items: center;
            span {
                margin-left: 15px;
            }
        }
    }
    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: 0px;
        }
    }
    .el-main {
        background-color: #EAEDF2;
    }
    .iconfont {
        margin-right: 10px;
    }
    .toggle-button {
        background-color: #485164;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>